CVE-2009-4307

Name	CVE-2009-4307
Description	The ext4_fill_flex_info function in fs/ext4/super.c in the Linux kernel before 2.6.32-git6 allows user-assisted remote attackers to cause a denial of service (divide-by-zero error and panic) via a malformed ext4 filesystem containing a super block with a large FLEX_BG group size (aka s_log_groups_per_flex value).
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
References	DSA-2443-1

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Urgency	Origin
linux-2.6	source	etch	(not affected)
linux-2.6	source	lenny	(not affected)
linux-2.6	source	squeeze	2.6.32-41squeeze2		DSA-2443-1
linux-2.6	source	(unstable)	2.6.32-2	low
linux-2.6.24	source	(unstable)	(not affected)

Notes

[etch] - linux-2.6 <not-affected> (vulnerable code introduced in 2.6.27)
[lenny] - linux-2.6 <not-affected> (vulnerable code introduced in 2.6.27)
- linux-2.6.24 <not-affected> (vulnerabile code introduced in 2.6.27)